On Jan 25, 2:29 pm, Meikel Brandmeyer <m...@kotka.de> wrote:
> Hi,
>
> Am 25.01.2009 um 20:00 schrieb Dmitri:
>
> > I ran into a situation where I needed to replace an element in a
> > collection at a specific position, I ended up writing the following:
>
> > (defn replace-at [coll pos value]
> > "replaces an element in collection at pos with the value"
> > (let [parts (split-at pos coll)]
> > (concat (first parts) (cons value (rest (second parts))))))
>
> > I was wondering if there's a standard function to do this
>
> At least for vectors (and of course maps) you can use assoc-in.
>
> 1:1 user=> (assoc-in [1 2 3] [1] :x)
> [1 :x 3]
>
Or simply assoc:
(assoc [1 2 3] 1 :x)
[1 :x 3]
Rich
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